Reverse-gear.



H. H. VAUGHAN.

REVERSE GEAR.

APPLICATION FILED APR. 1, 1912 9 m2 flu 1M 3 D @Ek MW f. m 2. Z P M RRVAUGHAN,

REVERSE GEAR.

APPLICATION FILED APR. 1, 1912,

Patented June 30, 1914.

2 SHEETS-SHEET 2.

J In

UmrEn STATES PATENT OFFICE.

' HENRY H. vaoenamor MONTREAL, QUEBEC, (IA-NADA.

REVERSE-GEAR.

I I specificationof. Ietters Patent.

Patented June 30, 1914.

Application filed April 1, 1912. Serial No. 687,908. 3

To all whom it may concern:

Be it known that I, HENRY H.' VAUGHAN, of the city of Montreal, Province of Quebec,

Dominion of Canada, have invented certain new and useful Improvements in Reverse- Gears; and I do hereby declare that the following is a. full, clear, and exact description thereof.

My invention relates to appliances by which the operation of a power mechanism is reversed, and more particularly to the reversal of the direction of operation of a mechanism by the use of motive fluid means.

The invention has for its object to pro-' ation and at other times releasing the same,

the said means being in operative relation with the power-mechanism to which it is applied. v

Specifically stated the invent-ion consists of means for the adjustment of a valve gear whereby either forward or backward move- 'ment or variation of the point of cut off,

when moving in either direct-ion may be effected,

For full;- comprehension, however, of my invention reference must be-had to the accompanying drawings in which corresponding reference characters indicate the same parts, and wherein:

Figure 1 is a side elevation of a reverse gear of a locomotive containing my invention; Fig. 2 is a detail partial plan view illustrating particularly the indicating derin -"Fig. 3 is a detail sectional viewtaken on line AfAlFig. 1; Figs. 4 and 5 are transverse vertical sectional'views taken on line B B and C C respectivelyFigp2; Figs. 6,

I 7, 9 and 10 are transverse vertical sectional view taken on line D D, F F, M M and P P respectively Fig. 1; Fig. 8 is a detail enlarged View part elevation and part in vertical section of the operating handle and the means operatively connecting the same to 'the motive fluid means; Fig. 11 is a detail longitudinal vertical sectional view of the reversing valve taken on line S Flg. 10.

In thedrawingsabove described the invention is illustrated applied to the reverse gear of a locomotive in which it is usual to employ a pair of alined cylinders, namely a resistance or dash-pot cylinder 2 and an operating cylinder 3 containing pistons 4' and 5 respectively connected by a piston rod I from which adjustment is transmitted to the slldevalve' of the locomotive through suitable-lever mechanism indicated at 6.

According to my invention the piston rod has a quick-thread screw 7 movable with the piston rod throughopenings in the arms 8 of a bracket 9 fastened, for convenience, to the boiler barrel. A nut 10 threaded upon this screw is locatedbetween these arms of the bracket andconfined thereby against movement longitudinallyjgrelatively to the screw; and the upper sidejof-Fthese armsis curved and presents a .sleeve' 12 and carries a bracket 13 of inverted U-form and having,

its middle formed with an opening. The

nut has an integral circumferential flange encircling the same with a series of notches- 20 cut therein and engaged by alocking device preferably in the form of a pawl or latch 21 formed by or attached" to the lower end of a rod 22, the upper end of which is coupled to a yoke 23. This yoke encircles the hub 24 of a bell-cra-nk-lever the fulcrum pin whereof is carried by a bearing bracket 25 preferably fixed upon the boiler barrel. Between the, hub and this bearing bracket an angular bracket 26 is fastened as at 27 to the face of the bearing bracket and the upper ends of the legs of this angular bracket has a pair of spaced quadrantal plates 30 rigidly carried thereby and provided with a pair of stops for limiting the lever being guided between these plates 30,

and a latch 31 serving to retain the lGWBI'lIl any desired angular posit-ion along the guide plates and between the stops. An expansile coiled spring 40 bears bet-ween the upper end of the bracket 13 and a collar 41 formed rigidly upon the rod 22 and yieldingly retains the latter in its downward position and the latch in position to engage the notched flange on the nut. The forward side of the yoke has a pair of lugs 45 arranged 'to be engaged by lateral cam projections 50 upon the hub of" the lever; the, bearing bracket being braced by a pair of struts fastened at their upper ends thereto and at their lower ends to the bracket 9.

latter, and'conseqnently the latch, -are troller for manually locking the piston rod against lon 'itndinal movement and uaon,

in ndex that this controller will cause mo tlve hunt to enter the motive fluid cylinder and the pis )1 rod to be shifted in either direction simultanoously with the releasing thereof, a rod 30 connects the horizontal arm of the bell-erank-lever to one arm 51 of an angular lever, the other arm 52 whereof is bent outwardly and connected by a rod 5 to a lever arm 51 connected rigidly to the stem of a )lug valve The chamber oi" this valve is secured to the underside of the cylinder and contains three parts and a motive fluid intake 59. The ports are indicated at 60, (31 and 62 and Communicate with ports (53, 641, G5 in'the cylinder-casing and leading, respectively, to the opposite ends oi: the latter and to an exhaust port midway of the length of the cylinder. The valve has a pair of circumferential ports and 81 adapted to, respectively, when in different. angular positions, effect a com- .munication between the ports 60 or 61 and 59, and [30 or 61 and 62.

The dash 'pot is controlled by a valve 90 having'a longitudinal series of diametrical ports 91 thereon, the chamber 92- of the valve being secured to the cylinder of-the dash pot and having a pair of ports 93 with alined inner ends terminating at the valve. A lever 9-1 fixed upon this valve is adjustable to dilterent angular positions to vary the capacity of the passage through the valve and therefore the resistance to the fluid passing through it.

A pointer 100 mounted on the piston rod at one end ofthe screw indicates on a scale the position of the piston-rod, and, conse-- quently the reverse lever, the scale consisting of a graduated plate 101 while a slid able plate 102, through an opening 103 in which the pointer projects is guided in its movement with the pointer by longitudinal guide plates 105.

Operation. Normally the hand lever stands vertically and the cams 50 being displaced from the lugs on the yoke 28, the de pressed by the spring 40 thus locking the nut 10 against rotation and the piston rod against longitudinal movement. By swinging the hand lever to the right or left, looking at Fig. 1, the latch is raised through the medium of the cam 50, yoke 23 and rod 22 and the nut disengaged.

ing a communication between the motivefluid supply port and portGO or 61 and between the other port, at the opposite side of the piston, to the exhanst port 70. The

l etlcct is that the piston is moved under the means thus far described is a con- Simultaneously the valve is swung to the pos1t1on eilect-' n ioness Moi energy of the motive fluid and the pistonrod, and with it the screw, is shifted through the .nut 10 which, being released, is free to rotate and permit the passage of: the screw. In this manner the lever mechanism 6 is caused to reverse or restore the normal condition of the slide valve of the locomotive.

Although I have disclosed this reversegear applied to a. locomotive it may'with equal utility be applied to the alternate rotary movement of a member and locking of the same against movement. relatively to a second member forming a part of other motive-fluid mechanism, withoutdeparting i'irom the spirit of my invention.

What I claim is as follows:

1. Means 101163 6151111; the operation of a power mechanism, such means comprising a cylinder with a piston therein and a valve for controlling a motive iluid supply to the cylinder, a device distinct from the reversing mechanisnifor locking the piston against operation, a controller, means operatively connecting the said controller to the lockingdevice, means whereby the said controller is operatively connected to the valve, and means operatively connecting the said piston to the mechanism to be reverse l.

2. A reverse gear comprising an axially movable screw, a cylinder having a piston therein, a valve upon the cylinder, means operatively connecting the piston to the screw, a nut having the screw threaded therethrough', means retaining the nut against movement along the screw, a looking means locking the nut against rotation, a manually operated lever, means operatively connecting the lever to the locking means, and means whereby the said lever' inder the said cylinder having supply and exhaust ports, a valve common to the said ports, a screw and a nut one movable relatively to the other and longitudinally relatively to the screw, means connecting the movable part to the objectto be moved, means locking the nut, a lever,means operativ ely connecting the lever to the locking means, and means whereby the said lever is operatively connected to the'valve.

LA reverse-gear comprising an axially movable screw, a cylinder having a piston therein, a valve upon the cylinder, means operatively connecting the piston to the screw, means for regulating the speed of axial movement of the screw, a nnthaving taining the nut against movement along the screw, displaceable means locking the nut against-rotation, a manually operated lever,

means operatively connecting the lever to' the locking means, and means whereby the 3 said lever is operatively connected to the said meanslo'cking the nut, a manually operated lever, means operatively connecting the manually operated lever to the locking,

means, and means whereby thesaid lever is operatively connected to the valve.

' 6. In combination with an object to be moved, a screw operatively connected to the 'ob ect, means for'movlngthe screw longitudinally, a nut upon the screw, means retaining the nut against longitudinal movement relatively to the screw, a device for locking the nut against rotation, and controlling means operatively connected to the locking device and to the means for moving the screw, such controlling means being adapted. at times to simultaneously release the nut and move the screw, and at other times lock the nut and the screw.

7. In combination with an object to be moved, a screw operatively connected to the object, means for moving the screw longitudinally, a nut upon the screw and in permanent engagement therewith means retaining the nut against longitudinal movement relatively to the screw, a device for locking the nut against rotation, and controlling means operatively connected to the locking device and to the means for moving the screw'for the purpose of at all times simultaneously releasing the nut and moving the screw and at' other times locking the nut and screw.

8. In combination with an object'to be moved, a motive-fluid cylinder containing a reciprocatory piston, 'a piston rod connected at itsouter end to the object, valvular means controlling the supply of-motive fluid to :the cylinder, a pair of interen-gaging members consisting-of a screw and a nut upon the screw, means whereby one of the said members is connected to and; moves in unison with the piston rod, means whereby relative movement between the nut and screw in a longitudinal direction with relation to the screw is prevented, a displaceable device for locking the nut againstrotation, andeontrolling means operatively connected to the consisting of a screw and a nut upon. the

screw, means whereby one of the said members is connected to and moved in unison with the piston rod, means whereby relative movement between the nut and screw in a longitudinal direction withg elation to the screw is prevented, a displaceable device for lo king the nut against rotation, and'manu ally operated controlling means operatively connected to the valvular locking device.

10. In combination with .an object tobe moved, a motive-fluid cylinder containing a reciprocatory piston, a piston rod connected at its outer end to the object, valvular means controlling the supply of motive-fluid to the cylinder, a pair of interengaging members consistingof a screwancl a nut upon the mechanism and screw and permanently engaging therewith, I

means whereby one of the said members is connected to and moves in unison with the piston rod, means whereby relative movement between the nut and screw in a longitudinal direction with relation to the screw is prevented, a displaceable device for looking the nut againstrotation, and controlling means operatively connected to the valvular mechanism and locking device.

. 11. In -combination with an object, to'be moved, a motive fluid cylinder containing a reciprocatory piston, a piston rodconnected at its outerend to the object, valvular means controlling the supply of motive fluid to the cylinder, a pair of interengaging members-consisting of a screw and a nut upon the screw, means whereby one of the said members is connected to and moves in unison with the piston rod, means whereby relative movement between the nut and screw in a longitudinal direction with relation to the screw is prevented, a displaceable device forlocking the nut against rotation,

reciprocatory piston, a piston rod connected at its outer end to theob'ect, valvular means controlling the supply 0 motive-fluid to the cylinder, a pair of interengaging members consisting of a screw and a nut upon the screw and permanently engaging therewith connecting means whereby one of the said members is connected to and moves in unison with the piston rod, means whereby relative movement between the nut and screw in a longitudinal direction with relation to the screw is prevented, a displaceable device for lockingthe nut'against rotation, and manually operated unitary controlling means operatively connected to the valvular mechanism and locking device.

13'. In combination with an object to be moved, a motive-fluid cylinder containing a reciprocatory piston, a iston rod connected a screw forming a component part of thepiston rod, a nut upon the screw, means.

whereby the nut is held against displacement with the piston rod while free to rotate, a displaceable device for locking the nut against rotation, and controlling means operatively connected to the valvular mechanism and locking device.

14. In combination with an object to be moved, a motive fluid cylinder containing a reciprocatory piston,"a dash pot consisting of a cylinder containing a piston and having a by-pass port, a piston. rod connected at its opposite ends to the respective pistons and between its ends to the object, valvular means controlling the supply of motive fluid to the cylinder, a screw forming the component part of the piston rod, a nut upon the screw means whereby the nut is held against displacement with the piston rod while tree to rotate, a displaceable device for lockin the nut a 'a-inst rotation and.

controlling means operatively connected to the valvular mechanism and locking device.

15. In combination with an object tobemoved, a motive-fluid cylinder containinga reciprocatory piston, a piston rod connected.

to the object, valvular means controlling the supply of motive fluid tothe cylinder, a screw forming a component part of the piston rod, a nut upon the screw and having an annular circumferential. notched flange, means whereby the nut is held against displacement with the piston rod while free to rotate, a locking pawl engaging the notched flange, a hand-lever, a rod and cam-mechanism connecting the lever to the pawl, a spring yieldingly retaining the pawl in en gagement with the notched flange, and lever mechanism operatively'connecting the hand lever to the valvular mechanism.

1C. In combination with an object to be moved, a motive-fluid cylinder containing a rcciprocatory piston, ,a dash pot consisting of a cylinder containing a piston and having a bypass port, a piston rod connected at its opposite ends totherespectivc pistons and between its ends to the object, valvular means controlling the supply of motive-fluid to the cylinder, a quick-threaded screw forming a component part of the piston rod, a not upon the screw and having an annular circumferential notched flange, means whereby the nut is held against displacement with the piston rod while free to rotate, a locking pawl engaging the notched flange, a handlever, a rod and cam-mechanism connecting the lever to the pawl, a spring yieldingly retaining the pawl in engagement with the notched flange, and lever mechanism operatively connecting the hand-lever to the valvular mechanism. I

17. In a locomotive, the combination with 'the reverse thereof including lever mechanism, of a motive fluid cylinder containing a piston, a piston rod connected to the said lever mechanism, valvular means controlling the supply of motive fluid to the cylinder, a screw forming a component art of the piston rod, a nut upon the screw, means whereby the nut is held against displacement with the piston rod while free to rotate, a displaceable device for locking the nut against rotation, and controlling means operatively connected to the valvular mechanisin and locking device.

18. In a locomotive, the combination with the reverse gear thereof including lever mechanism, of a motive fluid cylinder containing a piston, a piston. rod connected to the said lever mechanism, a valvular means controlling the supply of motive fluid to the cylinder, a screw forming a component part of the piston. rod, a nut upon the screw and havingan annular circumferential notched flange, means whereby. the nut is held against displacement with the piston rod while tree to rotate, a locking pawl engaging the notched flange, a hand-lever, a rod and cammechanism connecting the lever to the pawl, a spring yieldingly retaining the pawl in engagement with the notched flange, and lever [mechanism operatively connecting the hand lever to the valvular mechanism,

19. In a loco-motive, the combination with the reverse gear thereof including lever mechanism, of amotive fluid cylinder dontaining a piston, a dash pot consisting or a cylinder containing a piston and having a bypass port, a piston rod connected at its opposite ends to the respective pistons and between its, ends to the said lever mechanism,

valvular means controlling the supply of motive fluid to the cylinder, a quick-threaded screw forming a component part of the piston rod, a nut upon the screw, and having an annular circumferential notched flange, means whereby the nut is held against displacement with the piston rod while free to rotate, a locking pawl engaging the notched flange, a hand-lever, a rod and cammechanism connecting the lever to the pawl,

a spring yieldingly retaining the pawl in engagement with the notched flange, and

lever mechanism operatively connecting the hand lever to the valvular mechanism.

20. In a locomotive, the combination with the reverse gear thereof including lever mechanism, of a motive fluid cylinder containing a piston, a piston rod connected to the said lever mechanism, valvular means controlling the supply of motive fluid to the cylinder, a screw forming a component part of the piston rod, a nut upon the screw, means whereby the nut is held against displacement with the piston rod while free to rotate, a displaceable device for locking the 'nut against rotation, and controlling motive, and a pointer registering with the graduations andcarriedby the piston rod.

21. In a locomotive, the combination with the reverse gear thereof including lever mechanism, of a motive fluid cylinder containing a piston, a dash pot consisting of a cylinder containing a piston and having a by-pass port, a piston rod connected at its opposite ends .to the respective pistons and between its ends to the said lever mecha nism, valvular means controlling the supply of motive fluid to the cylinder, a quickthreaded screw forming a component part of the piston rod, a nut upon the screw, and having an annular circumferential notched flange, means whereby the nut is held against displacement with the'piston rod While free to rotate, a locking pawl engaging the notched flange, a hand-lever, a rod and cam- Inechanism connecting the lever to the pawl,

a spring yieldingly retaining the pawl in engagement with the notched flange, and lever mechanism ,opcratively connecting the hand lever to the valvular mechanism, a graduated member carried by a fixed part of the locomotive, and a pointer registering with the graduations and carried by the piston rod.

In testimony whereof I have signed my name to this specification in the presence of two witnesses.

, HENRY H. VAUGHAN.

Witnesses:

E. R. Prrrs, GORDON G. CooKE. 

